Question about 1994 Volvo 940

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I have a 1993 940 Volvo that is overheating and I do not think it is the radiator. We replaced the thermostat last night and I had no problems this morning then this afternoon when I was driving home it started to overheat. I pulled off to the side of the road and the fluid poured out the radiator out the bottom. I put stop leak in it two weeks ago and I have no problems until the past couple of days that have been very hot and humid in the afternoon! Any suggestions besides changing the radiator I am also losing oil pressure but still have sufficient oil.

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Hi there, I had EXACTLY the same problem, with my 92 940.
It's the intercooled 2.383, and it took a while to discover that the coolant was leaking from, what seemed like, an Enormous hole.
But I only discovered it straight away after filling it up, after a good short run.(while there was still coolant in it:)
Put stop leak in, which worked, instantly.
I speculate, that, you may have warped the head, which would indicate your loss of oil pressure.
It all depends on how overheated it got.
Not good news, I know but hope it helps.

Posted on Jul 22, 2009

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Make sure the electric fans are operating as they should.
Check for a blocked radiator core,
Check water pump drive OK,
Get a radiator shop to do 'coolant gas check' for a blown head gasket (looks for combustion gas bubbles in the water system).

Posted on Jun 20, 2009

  • John Bloomfield Jun 20, 2009

    Also check for a soft hose collapsing on the suction side of the water pump,

    Ensure you don't get an air lock when filling the system with coolant

    - check the coolant level after the engine has cooled following the first drive after re-filling the system with coolant- a check after the second drive is also re-assuring.



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